Mechanical movement.



H. E. EBERHARDT. MECHANICAL MOVEMENT. APPLICATION FILED APR.25. 913.

1,268,551, E Patented J1u1e4,1918.

WITNESSES.

INVENTOI? ATTORNEY HENRY E. EBERI-IARDT, 0F NEWARK, NEW JERSEY, ASSIGNORTO NEWARK GEAR CUTTING MACHINE 00., OF NEWARK, NEW

JERSEY.

JERSEY, A CORPORATION OF NET/V MECHANICAL MOVEMENT.

Patented June 4, 1918.

Application filed April 25, 1913. eria1 No. 763,498.

of New Jersey, have invented certain new.

and useful Improvements in Mechanical Movements, of which the followingis a specification.

The invention relates primarily to machines such as a crank shaper forshaping,

metal by means of a reciprocating tool, and particularly to means foreffecting the reciprocatory motion of the said tool.

The invention has for its object a lever of more simple construction andof greater rigidity than those in present use; and, moreover, to somount the same that a more efficient transmission of power from thedriving crank pin to the reciprocatory ram is obtained. A further objectof the invention is to provide a lever having one member for both thecutting and the return stroke, which member shall afford greaterproportional wearing surfaces than has heretofore been possible.

The nature of the invention will be best understood when described inconnection with the accompanying drawings, in which- Figure 1 is anelevation, partly in section, of a crank shaper embodying the invention.

Fig. 2 is a side elevation thereof and partly in section.

Fig. 3 is a horizontal section taken on the line y-g Fig. 2.

Similar characters of reference designate corresponding parts throughoutthe several views.

Referring to the drawings, 1 designates the frame of the shaper in whichis mounted a ram 2 to be reciprocated and carrying a cutting tool 3slidably mounted with respect thereto, as is well understood. To effectthis reciprocation of the ram 2, I employ a lever l, hereinafter morefully described, and hinged to the block 5 by means of a hinge pin 6,said block being adapted to be secured to the ram by means of a clampingplate 7 and handle 8. The lower end of lever 1 is preferably slidablyarranged in a bearing 9, which in turn is fulcrumed on a shaft 10 of theframe 1. Near its upper end, the lever 4: is arranged to slide through acrank pin block or saddle 11, preferably of one piece, and with which acrankpin 12 of a driving gear wheel 13 cooperates. Gear .bearingsurfaces 17-l7 and 18 18, preferably forming the periphery of arectangular section, Fig. .3, and which act as ways for the crank pinblock 11 to slide upon. It will be observed, moreover, that as the crankpin 12 and crank pin block 11 are actuated by the gear wheel 13, theirturning motion is transformed into an oscillating motion of the lever 4and which is compensated by the aforesaid mounting of the lower end ofsaid lever, the upper end thereof effecting the reciprocation of the ram2. During the forward or cutting stroke, the crank pin block 11 pressesuponthe surface 17 of the said lever 1, and on the return stroke thepressure is transferred to the surface 17.

The lever itself is herein illustrated as a straight bar of uniformsection throughout, contrary to the usual slotted construction, and ispreferably made of forged steel, its simple form readily lending itselfto the use of this material. Heretofore levers for the purpose hereinset forth have been of unsymmetrical section and actuated by blocksrunning in ways usually cut into the lever, which is thus divided intotwo ribs or members-one operative for the cutting stroke and the otherfor the return stroke. It is obvious that in such constructions theworking pressure tends to force the ways apart and to cause a sidethrust out of the true plane of motion, producing thereby chatter, lostmotion and noise. In the construction herein set forth in which thecrank pin block completely surrounds the lever for the length of theblock, heavy working pressures have no tendency to swerve the said blockor lever out of their true working plane.

Furthermore, with the recent general introduction of high speed steelcutting tools, shaping machines are reciprocated at a higher number ofstrokes per minute than formerly; and, as a consequence, the variousforms of lever heretofore in use tend to destroy the running balance,thus producing excessive wear between the connections of the crank pin,crank pin block or saddle and the ram block, as well as between the waysof the 'ram in the frame. The improved lever herein described providesfor. a maXimum rigidity with minimum Weight, is unslotted and ofsubstantially the same simple sectional formthroughoutits length,thereby a perfect running balance is obtained. The crank pin block orsaddle,

m r v r, din mm; the p ph y of aid lever, a greater Wearing surface andmore compact arrangement of parts is afforded than has heretofore beenpossible.

1. In combination: a frame, a carrier mounted to" reciprocate therein, alever to actuate'said carrier and of substantially rectangularcross-section, a circumscribing block acting upon the peripheral Ways ofsaid lever, and means to actuate said block.

eral Ways of said lever, and means to actuate 25 said block.

Signed at Newark, in the county of Essex and State of New Jersey, this24th day of April, A, D. 1913.

HENRY E. EB-E AR T,

Witnesses:

HENRY J EBERHABDT, J. E. FELDMAN.

Copies ct this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' 1 Washington, D. 0;

